Technological Knowledge Embedded in a Feature-based CAD Model (original) (raw)

ScienceDirect Development of an approach for Knowledge-Based System for CAD modelling

elsevier, 2018

In the process of reducing the production cost and satisfying the customer and to sustain in the current volatile market, the manufacturing companies are looking for alternate processes and methods of designing and manufacturing. The conventional CAD/CAM tools are developed to meet the general needs of the market, but not the rapid or specific requirements of the market or customer. Consequently, the companies are looking to customize or tailor the CAD/CAM tools to improve their effectiveness. For this reason, the scope of research in the field of customization of designing tools has improved rapidly in the recent time. This paper discusses an introductory approach for developing an knowledge based system for CAD modelling using customization process of an CAD/CAM tool. The intension behind the development of the system is to reduce the production time and cost. The effectiveness of the proposed system has been examined using an industrial case study.

Development of an approach for Knowledge-Based System for CAD modelling

Materials Today: Proceedings, 2018

Knowledge-Intensive CAD: Introduction and a Research Agenda

Knowledge Intensive CAD, 1996

The ultimate goal of advanced computer-aided design technologies is to facilitate effective product design and manufacturing activities in industrial companies through the whole lifecycle of industrial products. A central means for achieving this long-term goal is turning various types of knowledge on industrial products, their manufacture, use, maintenance, and other life-cycle activities into a reusable resource for the company, and deploying the resulting life-cycle knowledge during product development and manufacture, particularly the early design stages. It is claimed that these two-knowledge capitalisation and knowledge deployment-are essential characteristics of a Knowledge-Intensive CAD environment. Based on this view, the paper will discuss some of the characteristics, issues, and challenges of knowledge-intensive CAD systems, and give a draft research agenda for future. T. Tomiyama et al. (eds.

CAD and the product master model

Computer-Aided Design, 1998

We develop an architecture for a product master model that federates CAD systems with downstream application processes for different feature views that are part of the design process. The architecture addresses especially the need to make persistent associations of design information with net shape elements. Moreover, the design respects the need of commercial CAD systems (and of downstream applications) to maintain proprietary information that must not be disclosed in the master model. Two case studies consider the requirements on the master model architecture for geometric dimensioning and tolerancing, and for manufacturing process planning using NC machining. We discuss how to reconcile the associated feature views and how to update them under net shape redesign. The case studies indicate that many design changes that arise from these downstream views can be formalized by a well-defined problem on dimensional and geometric constraints. ᭧

A CAD - System engineering interoperability by Enriching CAD database with functional information

2021 18th International Multi-Conference on Systems, Signals & Devices (SSD)

The functional aspect of the parts and assemblies is the engine that generates constructive solutions that satisfy customer requirements. When specifying design solutions, the designer always thinks in terms of function to be satisfied. However, this information is immediately lost once the design solution is validated. In this context this paper will first contribute to the enrichment of the "computer aided design, (CAD)" modeler database by integrating data related to product functions. Then, it will enrich the data related to assembly constraints by the fit aspect. It would be useful if the designer can specify, when creating an assembly constraint between a shaft and a hub (either through bearings, bushings or by direct contact), the type of constraint fit (tight, loose or uncertain). This information will be necessary, for example, when automatically generating assembly or disassembly drawings. The main objective of the proposed paper is the development of two applications. The first application named "computer aided design part function, (CAD PF)", used for the enrichment of the parts database by the part function. The second one named "computer aided design adjustment constraint type, (CAD ACT)", used for the enrichment of the database of assemblies by the type of constraint adjustment during their creation. These tools will be modeled by the graphical "system modeling language, (SysML)" and will be implemented using FreeCAD "Applications Programming Interfaces, (APIs)" which is an open source application.

From Customer Needs to Design Parameters: Description of a Knowledge Based and Functionnal Cad Model

2009

Since the last decade, considering the globalization process of the economy, the market evolution has tended to reduce product costs and to decrease time devoted to the product design and development. In this context, it is also important to consider the growing need for improving product performance and for integrating user specifications very early in the design process. In order to answer these needs, this paper proposes a specific design method based on Axiomatic Design methodology and a functional analysis in order to reduce the time dedicated to routine engineering. This method is directly integrated into our self-developed PLM system-Product Lifecycle Management-in order to work in a worldwide and collaborative design environment. The main objective of our methodology is to define the CAD model geometry according to the modifications and the customer needs. In order to manage such control, we can identify functional parameters and functional rules through the functional requirements and the input constraints. Moreover, we can extract the specific parameters and the specific rules from the older CAD models stored in the Product Data Management system or PDM from the previous and validated project. Our method explains how to obtain and link the different parameter types and rules through the definition of a theoretical Functional Knowledge which relates a 3D geometry entity to a customer need. This knowledge aims at giving an input to a knowledge management system. It also defines a specific architecture of the 3D CAD product based on the system components divided in functional entities. This specific architecture is used in order to perform and lay the foundation of a Knowledge-Based Engineering methodology or KBE. Moreover, this specific CAD architecture gives us a possibility to develop our data mining methods which are included into our KBE approach.

Functional surfaces as initial product design concept in 3D-CAD-Systems

2017

Finding an initial shape design for innovative product concepts is one of the most challenging and most creative parts in product design processes. To support design engineers during that particular phase, knowledge based design automation tools can be used. This paper proposes an enhancement of existing design methodologies in terms of initial shape design of innovative product concepts.The presented approach consolidates PLM and parametric 3D CAD technologies into one integrated method. A concept of parametric working surfaces as an institutionalized feature embedding product lifecycle knowledge is described and briefly demonstrated with a software example. The approach intends to support the product designer with additional information from different company departments as well as giving the designer a tool to explicitly declare the design intent of its design concept in the very early phase of geometric shape definition.

Integration of Design Tools and Knowledge Capture into a CAD System: A Case Study

Concurrent Engineering, 2010

Conceptual design phase is partially supported by product lifecycle management/computer-aided design (PLM/CAD) systems causing discontinuity of the design information flow: customer needs -functional requirements -key characteristics -design parameters (DPs) -geometric DPs. Aiming to address this issue, it is proposed a knowledge-based approach is proposed to integrate quality function deployment, failure mode and effects analysis, and axiomatic design into a commercial PLM/CAD system. A case study, main subject of this article, was carried out to validate the proposed process, to evaluate, by a pilot development, how the commercial PLM/CAD modules and application programming interface could support the information flow, and based on the pilot scheme results to propose a full development framework.

Technological Knowledge Embedded in a Feature-based CAD Model (original) (raw)

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